Malicious PDF — malware analysis report

Static analysis result for SHA-256 80a36f9fb232938f…

MALICIOUS

PDF

51.0 KB Created: 2021-06-11 05:27:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fc93667a12be1e9477b2ec761ac9978e SHA-1: d56e6033d9952322e24db8645e8179060741f560 SHA-256: 80a36f9fb232938f87946776a52696eeec286a842301b763ec372ccc05e114b5
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure and an urgency-based lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9724

Heuristics 6

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.tw/app/431946152/vermillion-roblox-hacks-game-hack PDF link annotation
    • http://digilib.stimata.ac.id/repository/martian-lettuce-coin-master-free_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/hack-coin-master-343-apk_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/pokemon-go-hack-free-pokecoins_GM1094591345.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-hack-android-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-shields-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-daily-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-lost-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/spin-link_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/get-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/minecraft-maps-pe-free-download_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/hack-coin-master-online-without-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-roblox-items-in-catalog_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/robux-boost_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/http-roblox-free-robux-hol-es_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/hack-coin-master-apk-358_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • https://www.semrush.com/prices/In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050a7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50A7 30528 bytes
SHA-256: 75f79e36af1b75dc505c1a9c79d4e0677d6706b47002de1f33fa7f16ce92f553
font_01_sfnt_off0000936e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x936E 6636 bytes
SHA-256: 62075f0fe13502d46afb6e55e83d440c29ef4988399537df1f86e7653ce3b744
font_02_sfnt_off0000a37b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA37B 18696 bytes
SHA-256: 6282155d5a887546c2c36208b582f15f29e9d0badf55114eaf934c558bd9e6ea

Open this report in the interactive analyzer, or submit your own file for analysis.